Boiler-furnace



(No Model.)

W. L. TETER.

BOILER FURNAGE.

No. 499,054. Patented June 6, 189B.

91' irness as: I

Unrrnn STATES PATENT OFFICE.

WILLIAM L. TETER, OF PHILADELPHIA, PENNSYLVANIA.

. BOILER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 499,054, dated June 6,1893.

Application filed September 7. 1891.

To all whom it mag concern.-

Be it known that I, WILLIAM L. TETER, of the city and county ofPhiladelphia and State of Pennsylvania, have invented an Improvement inBoiler-Furnaces, of which the following is a specification.

My invention relates to furnaces for the generation of heat, andconsists of certain improvements which are fully set forth in thefollowing specification and are shown in the accompanying drawings whichform a part thereof.

It is the object of my invention to produce a convenient and efiicientfurnace for employing hydrocarbon gas or vapor as a source of heateither by itself or as an auxiliary for the purpose of producing a moreperfect combustion of the ordinary fuel employed.

In carrying out my invention I employ certain novelties in theconstruction and arrangement of the parts whereby the live or exhauststeam of an engine may be mixed with hydrocarbon and introduced into theburners after being thoroughly mixed and gasified. In connection withthe steam and oil superheated air may be employed as is more fully setforth hereinafter.

In the drawings: Figure 1 is a side elevation with part in verticalsection of a steam boiler furnace embodying my invention. Fig. 2 is aplan view of the burner pipe, and Fig. 3 is a horizontal sectional viewof the mixing and superheating chamber.

A is the combustion chamber of the furnace.

B is the fire grate which may be used when ordinary fuel is employed.

0 is the boiler.

D is the smoke outlet or stack.

.E is a burner located preferably under the grate B and consisting of aseries of perforated pipes connecting with a main pipe F.

G is a superheating and mixing chamber in which the oil, air and steamare thoroughly mixed and superheated so as to be converted into agaseous form. This superheating and mixing chamber is preferably locatedimmediately above the grate B, and may be filled with refractorymaterial such as broken fire brick.

H is a series of partitions within the cham- Serial No. 404,967. (N0model.)

berG to cause the gas to pass more fully through the refractory materialand come in contact with a greater area of surface. The refractorymaterial may be inserted in the chamber G through apertures g therein,which may be closed and sealed by plugs h. The chamber G is connectedwith the burner through a pipe.

I is a pipe leading from an injectorJ to the chamber G, by which themixture is led to the chamber G.

K is a steam pipe for conveying steam to the injector J. This pipe Kconnects with the exhaust pipe L of the engine through the valved pipeM. It may also connect with the boiler O to supply live steam to theinjector J through a valved steam pipe K, as shown.

N is a blower for forcing air into the pipe 0 which connects with thesteam pipe K preferably below the point of junction of the pipe K andthe exhaust pipe M.

The pipe 0 passes through the smoke outlet or stack adjacent to theouter end of the boiler preferably in the form of a coil whereby the airtherein may be superheated before it is mixed with the steam in the pipeK.

The pipe 0 may be provided with a. valve 0.

P is an oil reservoir, the upper portion of which is connected with theinjector J through a valved pipe Q. The steam pipe K is connected withthe bottom of the reservoir P to supply steam thereto to force out theoil from the reservoir into the pipe Q. The water of condensation fromthe steam in the bottom of the reservoir holds the oil at the top.

19 is an outlet for water of condensation.

R is a supply tank for supplying oil to the reservoir P.

S is the hot water heater of the engine ex- .haust pipe L, ands is theusual back pressure valve.

The injector J may be of any convenient well known construction.

While I prefer the minor details of construction which are shown I donot limit my invention to them as it is apparent that they may be variedin many ways without departing from it.

The exhaust steam with an initial pressure equal to that produced by theback pressure valve spasses from the exhaust pipe L through the pipe Minto the pipe K where it is mixed with superheated air from the pipe 0.This mixture of exhaust steam and superheated air enters the injector .Iand passes into the pipe I drawing with it a quantity of oil from thereservoir P. This mixture of steam, air and oil enters the chamber G andin passing through it becomes thoroughly mixed and gasified, in whichcondition it reaches the burners.

In starting the furnace ordinary fuel may be employed upon the grate Bto generate enough steam to start the necessary circulation and to heatthe superheating and mix ing chamber. The fire upon the grate B may bediscontinued however when the apparatus is fully in operation. WVhenhowever the vapor or gas from the burners is to be employed as anauxiliary, it is used with the ordinary fuel upon the grate for thepurpose of producing a more perfect combustion thereof, and thusobtaining a greatly increased heating effect with a less quantity offuel. The mixture of steam and oil enters the chamber G and beingsubjected to the very high degree of heat by the combustion of the fuelupon the grate becomes thoroughly mixed and transformed into a gaseouscondition. The oil is thus transformed into volatile hydrocarbon andreacting with the decomposed steam forms combustible gases which passdown through the pipef to the burners E, and emerging therefrom belowthe body of incandescent fuel upon the grate are evenly distributedthroughout the area thereof'and are burned with the fuel upon the grateproducing a more complete combustion and great heating effects. Inpractice a portion of the steam is usually not decomposed in the chamberG, and these undecomposed portions of the steam aft-er emerging from thepipes E pass up through the body of the incandescent fuel and by contacttherewith are converted into hydrocarbon and carbon monoxide andtogether with some of the hydrocarbon gases pass through the body of thefuel and are consumed in the space immediately above the same.

The particular construction of the chamber G is immaterial to thepresent invention.

When desired live steam direct from the boiler may be used through thepipe K, either to assist the exhaust, or as a substitute for the exhaustwhen the engine is shut down.

The chamber G in addition to its function as a mixing and superheatingchamber, serves also to equalize the pressure in the burner E.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination of a boiler and its furnace, a grate in the furnace,a burner located immediately under the grate, a superheating and mixingchamber located within the furnace and above the grate and connectedwith the burner, an oil reservoir, a steam exhaust pipe, and pipesconnecting the exhaust pipe and oil reservoir with the super-heating andmixing chamber, whereby the grate may be employed with ordinary fuel tostart the generation and circulation of the steam to generate a gas andintroduce the same from the burner under the grate.

2. The combination of a boiler and its furnace, a grate in the furnace,aburner located immediately under the grate, a superheating and mixingchamber located within the furnace and above the grate and connectedwith the burner, an oil reservoir, a steam exhaust pipe, pipesconnecting the exhaushpipe and oil reservoir with the superheating andmixing chamber, a blower and an air pipe leading from the blower to thepipes which lead to the superheating and mixing chamber for introducingair to said pipes and passing through furnace so as to superheat the airbefore it is introduced into said pipes, whereby the grate maybeemployed with ordinary fuel to start the generation and circulation ofthe steam to generate a gas and introduce the same from the burner underthe grate.

3. In a furnace for generating heat by the combustion of fuel upon agrate, the combination with the fuel supporting grate, of a mixing andsuperheating chamber for generating gas located above the grate and atthe rear portion thereof so as to be subjected to the products ofcombustion passing from the fuel on the grate, oil and steam pipesleading.

to said chamber to supply oil and steam thereto, a burner locatedimmediately under the grate so as to be directly under the fuel thereon,and a connection between the burner and the chamber for generating gas,whereby the oil and steam are converted into a gas in the generatingchamber and then in a gaseous form pass to the burner and thence to thefuel upon the grate and are burned therewith.

4. In a furnace for generating heat by the combustion of fuel upon agrate, the combination with the fuel supporting grate, of a burnerlocated immediately under the grate so as to be close to the fuelcontained thereon and consisting of a series of perforated pipes, asuperheating and mixing chamber for gen erating a gas located above thegrate and at the rear thereof, a connection between the gas generatingchamber and the burner, and pipes to supply oil and steam to the gasgenerating chamber.

5. In a furnace the combination with the bridge wall, of a fuelsupporting grate, a superheating and mixing chamber for generating a gaslocated above the grate and close to the bridge wall so as to leavesubstantially the entire upper surface of the grate unobstructed for thereception of coal, a burner consisting of a series of perforated pipeslocated immediately under the grate and extending under a substantialarea thereof, so as to supply gas to all parts of the fuel upon thegrate, a connection between the" burner and gas generating chamber, andpipes to supply steam and oil to the said chamber.-

6. The combination of afurnace and boiler, from the reservoir, and amixture of hot air, a superheating chamber located in the comoil andsteam passes from the injectorthrough bustion chamber of the furnace, afurnace the pipe leading therefrom intothe superheat- I5 grate, a burnerlocated below the grate and ing chamber Within the combustion chamber 5connected with the burner, an injector, a pipe of the furnace.

leading therefrom to the super-heating cham- In testimony of whichinvention I have her, an oil reservoir, a pipe leading from the hereuntoset my hand. oil reservoir to the injector, a steam pipe leading to theinjector, and a hot air pipe WILLIAM L. TETER. IO connecting to thesteam pipe before it reaches Witnesses:

the injector, whereby a mixture of hot air and ERNEST HOWARD HUNTER,

steam enters the injector and draws the oil S. T. YERKES.

